jay gray is live in that area of oregon right now. jay, no rational to this, do we know anything about whether this was a legal weapon, a semi-automatic rifle, of course, raised concerns nationally for years because of the whole lapsing of the assault weapon ban. >> reporter: yeah, absolutely, andrea. what we do know is it was a stolen ar-15. no, it wasn't legal as far as jacob tyler roberts was concerned, we don't know the origin where it was stolen at this point. we are still learning information as it becomes available here. the victims were totally random, he did not know the two people who were killed and the one who was injured. also we're learning he did not have on a bullet-proof vest or body armor like some of the witnesses suggested. he was wearing a hockey mask, we know that for certain. we also know that police believe their quick response helped to contain this and stop it from becoming much worse. they actually did not wait for s.w.a.t. teams when they arrived at the mall. they went into the mall two by two, something th